I found the chord types used in the opening section, and in broken form later on, particularly evocative. Whether or not I would have described it as an aubade without prompting I cannot say, but it certainly lends itself to that image.
Chord types are fascinating things. While we all have probably long since outgrown simplistic universal associations, such as sad minors and so on, a particular chord type sometimes establishes an emotional or psychic image which lasts for many years, possibly a lifetime. The business, for an improviser, of determining whether such personal attractors are fertile to future creation or just banal reflex and habit is by no means always easy or clear, or so I have found over the years.